11. Deposits

The following schedule sets forth interest expense by type of deposit:

	Years Ended December 31
	2017		2016		2015
	(In Thousands)
Checking and money market accounts	$	2,033	$	1,463	$	1,186
Savings accounts		102		88		89
Certificates of deposit		6,683		4,710		4,066
Totals	$	8,818	$	6,261	$	5,341

Accrued interest payable on deposit accounts amounted to $97,000 and $42,000 at December 31, 2017 and 2016, respectively, which was comprised of $68,000 and $29,000 for certificates of deposit and checking and money market accounts, respectively, at December 31, 2017, and $19,000 and $23,000 for certificates of deposit and checking and money market accounts, respectively, at December 31, 2016.

A summary of deposit balances is as follows:

	December 31
	2017		2016
	(In Thousands)
Non-interest bearing checking accounts	$	571,360	$	487,663
Interest bearing checking and money market accounts		1,005,519		816,665
Savings deposits		302,022		243,369
Retail certificates of deposit less than $250,000		504,912		400,080
Retail certificates of deposit greater than $250,000		53,843		33,851
	$	2,437,656	$	1,981,628

Scheduled maturities of certificates of deposit at December 31, 2017 are as follows (In Thousands):

2018	$	252,895
2019		180,739
2020		52,453
2021		47,516
2022		25,016
Thereafter		136
Total	$	558,755